<template>
    <!-- 页面背景颜色 -->
    <div class="login_container">
        <!-- 登录框 -->
        <div class="login_box">
            <!-- 头像区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登录表单区域  ref='loginFormRef'引用对象-->
            <el-form ref='loginFormRef' :model='loginForm' :rules='loginFormRules' label-width="0px" class="login_form">
                <!-- 用户名 -->
                <el-form-item prop='username'>
                    <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop='password'>
                    <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
                </el-form-item>
                <el-form-item class="btns">
                    <el-button type="primary" @click='login'>登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
  data () {
    return {
      // 登录表单的数据绑定
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      // 用户信息表单验证
      loginFormRules: {
        username: [
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 2, max: 8, message: '长度在 2 到 5 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入活动名称', trigger: 'blur' },
          { min: 6, max: 12, message: '长度在 6 到 12 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  created () {

  },
  mounted () {

  },
  methods: {
    // 点击重置按钮重置表单
    resetLoginForm () {
      // console.log(this);
      // 通过this.$refs.loginFormRef可以直接获取到表单的引用对象
      this.$refs.loginFormRef.resetFields()
    },
    // 点击登录，表单预验证
    login () {
      this.$refs.loginFormRef.validate(async valid => {
        // console.log(valid); //true
        if (!valid) {
          return
        }
        // 对服务器返回的数据进行解构
        const { data: res } = await this.$http.post('login', this.loginForm)
        // const res=await this.$http.post('login',this.loginForm)
        // res中data才是服务器真正返回的值
        // console.log(res);
        if (res.meta.status !== 200) return this.$message.error('登录失败')
        this.$message.success('登录成功')
        /*
                  登录成功后把token保存到本地，通过路由把页面跳转到home页面

                */
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style scoped lang="less">
    .login_container{
        background-color: #2b4b6b;
        height: 100%;
    }
    .login_box{
        width: 450px;
        height: 300px;
        background-color: #fff;
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%,-50%);
        border-radius: 3px;
    }
    .avatar_box{
        width: 130px;
        height: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        box-shadow: 0 0 10px #ddd;
        padding: 10px;
        position: absolute;
        left: 50%;
        transform: translate(-50%,-50%);
        background-color: #fff;
        img{
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background-color: #eee;
        }
    }
    .login_form{
        position: absolute;
        bottom: 0;
        width: 100%;
        padding: 0 20px;
        box-sizing: border-box;
    }
    .btns{
        display: flex;
        justify-content: flex-end;
    }
</style>
